Vulnerability · Published Nov 4, 2026 · Assigned by GitHub_M
CVE-2026-113780ESF-IDF: Unvalidated Stack Pointer at the ESP-TEE Privilege-Switch Boundary
Critical 9.3
In plain English
A critical-severity out-of-bounds write in esp-idf from espressif. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Official description
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.5.5 until 5.5.6, 6.0.4, and 6.1.1, the esp_tee trap entry in esp_tee_vectors_plic.S and esp_tee_vectors_clic.S saves a caller-controlled register frame through the REE-supplied stack pointer before switching to the trusted TEE stack or validating the pointer. A local unprivileged REE application can direct this machine-mode write into TEE-exclusive memory on ESP32-C5, ESP32-C6, ESP32-C61, and ESP32-H2 devices, breaking the REE/TEE isolation boundary and potentially corrupting TEE control-flow data for code execution, denial of service, or system crashes. Both secure-service ecall and interrupt entry paths contain the vulnerable ordering. This issue is fixed in version 5.5.6 and is scheduled to be fixed in versions 6.0.4 and 6.1.1.
Affected products (as reported)
Weakness: CWE-787, CWE-822 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/espressif/esp-idf/security/advisories/GHSA-49x8-xqjg-2pjg x_refsource_CONFIRM
- https://github.com/espressif/esp-idf/commit/773761abb893d43d0a5b8b75ec0a1c2cf0287d53 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/acb7d996b07293abf591b93f4aaffa04ae6732d9 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/b85a7b0e1449ac9aec30a0c3e3b6515725556fd1 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/dabd37fae8d2a7b1cc71f48fce824b0b9d909a07 x_refsource_MISC
- https://github.com/espressif/esp-idf/releases/tag/v5.5.6 x_refsource_MISC